Impact Comparison Lens Test
See the difference
The Polaroid PTX 4000lens absorbes most of the impact energy, not transferring the energy to the frame and head compard to Acrylic or Polycarbonate lenses.

The Polaroid PTX 4000lens absorbes most of the impact energy, not transferring the energy to the frame and head compard to Acrylic or Polycarbonate lenses.